Senior Federal Tax Calculator

How this calculator works

Tax rules for older Americans have several moving parts: part of your Social Security may be taxable, you get a larger standard deduction at 65, and a new senior bonus deduction applies for tax years 2025 through 2028. This calculator puts those pieces together to estimate your federal income tax for 2026 or 2027.

The inputs. Choose the tax year, your filing status, how many people on the return are 65 or older, your annual Social Security benefits and your other income (pensions, IRA withdrawals, wages, interest and similar). The 2026 figures are official, from IRS Revenue Procedure 2025-32. The 2027 figures are projected until the IRS publishes its annual inflation adjustments.

The method.

1. Taxable Social Security is worked out with the IRS Publication 915 logic (up to 50% or 85% taxable, depending on provisional income). Our Social Security tax calculator shows this step in detail.
2. AGI = other income + taxable Social Security.
3. Standard deduction. For 2026: $16,100 single, $32,200 married filing jointly, $24,150 head of household, plus $2,050 for each 65+ single or head-of-household filer, or $1,650 per 65+ married person. For 2027 (projected): $16,600, $33,200 and $24,900, plus about $2,100 single or $1,700 married.
4. Senior bonus deduction: $6,000 per person 65 or older, reduced by 6% of MAGI above $75,000 (single or head of household) or $150,000 (joint). It is fully phased out at $175,000 or $250,000. Married couples must file jointly to claim it.
5. Taxable income = AGI − standard deduction − senior bonus (not below zero).
6. Federal tax is calculated with that year's brackets, and the effective rate compares the tax with your total income.

Income above the 35% limit is taxed at 37%.

Worked example (2026). Patricia is single and 67. She receives $24,000 in Social Security and $30,000 from a pension and IRA withdrawals.

• Taxable Social Security (Pub 915 logic): $11,300.
• AGI: $30,000 + $11,300 = $41,300.
• Standard deduction: $16,100 + $2,050 = $18,150.
• Senior bonus: her MAGI is under $75,000, so the full $6,000 applies.
• Taxable income: $41,300 − $18,150 − $6,000 = $17,150.
• Tax: 10% × $12,400 = $1,240, plus 12% × $4,750 = $570, for a total of $1,810.

Measured against her total income of $54,000, her effective federal rate is about 3.4%. Without the senior bonus deduction, her taxable income would be $23,150 and her tax $2,530, so the new deduction saves her $720. Our guide to senior tax deductions explains who qualifies.

Limits of this estimate. The calculator uses the standard deduction only; it does not handle itemized deductions, tax credits, the lower rates on qualified dividends and long-term capital gains, self-employment tax or the alternative minimum tax. It treats MAGI as equal to AGI for the senior bonus phase-out. It does not include state income tax; see our state tax on Social Security tool. 2027 results are projections and may change.